Netazepide, an Antagonist of Cholecystokinin Type 2 Receptor, Prevents Vincristine-Induced Sensory Neuropathy in Mice.

Among the vinca-alkaloid class, vincristine is a potent chemotherapeutic agent with significant neurotoxic effects and is employed to address a wide spectrum of cancer types. Recently, the therapeutic potential of the cholecystokinin type 2 receptor (CCK2R) as a target for vincristine-induced peripheral neuropathy (VIPN) was demonstrated. In this study, the impact of preventive CCK2R blockade using netazepide (Trio Medicines Ltd., London, UK) was investigated in a mouse model of vincristine-induced peripheral neuropathy. Netazepide is a highly selective CCK2R antagonist under development for the treatment of patients with gastric neuroendocrine tumors caused by hypergastrinemia secondary to chronic autoimmune atrophic gastritis. Vincristine-induced peripheral neuropathy was induced by intraperitoneal injections of vincristine at 100 µg/kg/d for 7 days (D0 to D7). Netazepide (2 mg/kg/d or 5 mg/kg/d, per os) was administered one day before vincristine treatment until D7. Vincristine induced a high tactile allodynia from D1 to D7. VIPN was characterized by dorsal root ganglion neuron (DRG) and intraepidermal nerve fiber (IENF) loss, and enlargement and loss of myelinated axons in the sciatic nerve. Netazepide completely prevented the painful symptoms and nerve injuries induced by vincristine. In conclusion, the fact that netazepide protected against vincristine-induced peripheral neuropathy in a mouse model strongly supports the assessment of its therapeutic potential in patients receiving such chemotherapy.

[Interest of a short educational intervention coordinated by community pharmacists for elderly type 2 diabetes patients in a rural area]. / Intérêt d'une séance éducative « flash ¼ coordonnée par des pharmaciens d'officine pour des patients âgés diabétiques de type 2 en milieu rural.

The number of elderly people with type 2 diabetes (T2D) is increasing worldwide. Community pharmacies, thanks to their proximity, provide more easy access to therapeutic education for rural patients. Populations living in isolated areas require specific educational resources related to their condition. The aim of this project was to perform a short (FLASH) educational intervention, coordinated by community pharmacists, and then evaluate the impact of this intervention on patient knowledge of their disease. The study was performed in Issoudun, a rural French town of approximately 10,000 inhabitants. Educational priorities were defined and the project was presented to health authorities and local health professionals. Pharmacies in Issoudun recruited patients, either alone or accompanied by their caregivers. The educational intervention lasted 2h and focused on 4 teaching objectives: knowledge concerning diabetes, diabetic complications and how to monitor them; how to react to hypoglycemia; understanding treatments; and understanding glycated hemoglobin. The impact of this educational intervention was assessed using a questionnaire delivered before the intervention, immediately after, and after 6months. Forty-five patients aged 71±6years with T2D duration of 14±6years were recruited over 6months. Some false beliefs were identified before the intervention. The educational session led to a significant improvement in the percentage of correct answers (before: 60.3%±7.5, after: 99%±0.4, P=0.0002) and at 6months (99.5%±0.3, P=0.0002) compared with the patients' initial knowledge. Almost all false beliefs were corrected by the intervention and patients were able to recall the mechanism of action of their drugs, with the help of a "key and lock" schematic. This short FLASH educational intervention, coordinated by community pharmacists, showed that the model was both interesting to patients and effective. This method could be expanded to other rural communities and medical deserts.

Neuroprotective Effect of Polyvalent Immunoglobulins on Mouse Models of Chemotherapy-Induced Peripheral Neuropathy.

The occurrence of neuropathic pain in chemotherapy-induced peripheral neuropathy (CIPN) is a major dose-limiting effect of many commonly-used anticancer agents. Polyvalent human immunoglobulins (hIg), used in the treatment of several peripheral neuropathies, may alleviate neuropathic pain. The aim of this project was to investigate the preventive effect of hIg in two mouse models of CIPN, induced by vincristine (VCR, 100 µg/kg/d) and oxaliplatin (OXP, 6 mg/kg/3d). Human Ig were administered one day before the first injection of chemotherapy. The onset of CIPN and effects of hIg were assessed via functional tests and morphological analyses of sensory nerves. To evaluate the effect of hIg on chemotherapy cytotoxicity, viability assays were performed using hIg (0 to 12 mg/mL) combined with anticancer agents on human cancer cell lines. The preventive treatment with hIg alleviated tactile hypersensitivity and nerve injuries induced by VCR. It also alleviated tactile/cold hypersensitivities and nerve injuries induced by OXP. Treatment with hIg did not affect the cytotoxicity of either chemotherapy. Furthermore, in combination with VCR, hIg potentiated chemo-induced cell death. In conclusion, hIg is a promising therapy to prevent the onset of CIPN and potentiate chemotherapy effect on cancer, reinforcing the interest in hIg in the management of CIPN.